An unnamed businessman has pledged £50,000 to save a Roman helmet for the nation, on condition the public match his donation.
The rare 2,000-year-old Crosby Garrett Helmet is thought to be one of only three of its kind in Britain. It was unearthed by a treasure hunter and is expected to fetch £300,000 at a Christie's auction next month. But Tullie House Museum & Art Gallery in Carlisle, Cumbria, is raising funds to save the helmet from going abroad.
Hilary Wade, of Tullie House, said: "The clock is against us but if everyone can give even a pound, the benefactor will match it. This will significantly increase the chances of Tullie House having the financial clout to be able to compete at the auction in London, and bring this helmet back to its rightful home."